Feasibility of Reclaimed Asphalt Pavement as Aggregate in Portland Cement Concrete

This research effort was focused on evaluating the feasibility of using minimally processed reclaimed asphalt pavement (RAP) as aggregate replacement in concrete pavements. This research demonstrated that concretes with up to 50 percent of the fine aggregates and 100 percent of the coarse aggregates replaced with RAP were suitable for concrete pavement. A statistical experimental design procedure (response surface methodology – RSM) was used to investigate proportioning RAP concrete mixtures to achieve desired performance criteria. Based on the results of the RSM investigation, two concrete mixtures were selected for further evaluation: a high RAP mix with fine and coarse aggregate replacement rates of 50 and 100 percent respectively, and a “high” strength mix with one half of the RAP used in the high RAP mix. Both mixes met Montana Department of Transportation (MDT) concrete pavement specifications for slump (1.5 inches), air content (6 percent), and 28-day compressive and tensile strengths (3,000 psi and 500 psi, respectively). These two concrete mixtures were subjected to a suite of mechanical and durability tests to evaluate their potential use in Montana roadways. Mechanical properties tested were compressive and tensile strength, elastic modulus, shrinkage, and creep. Durability tests included alkali-silica reactivity, absorption, abrasion, chloride permeability, freeze-thaw resistance, and scaling. Overall, both mixes performed adequately in these mechanical and durability tests, although it is important to note that the inclusion of RAP had an obvious negative impact on nearly every property tested relative to those of control mixes made with 100 percent conventional aggregates.

• Record URL:
  http://www.mdt.mt.gov/other/webdata/external/research/docs/research_proj/cement/FINAL_REPORT_NOV13.pdf
• 
• Summary URL:
  https://www.mdt.mt.gov/research/projects/mat/cement.shtml
• Supplemental Notes:
  • This document was sponsored by the U.S. Department of Transportation, University Transportation Centers Program.
• Corporate Authors:

  Western Transportation Institute

  Montana State University, Bozeman
  P.O. Box 174250
  Bozeman, MT  United States  59717-4250

  Montana Department of Transportation

  2701 Prospect Avenue
  P.O. Box 201001
  Helena, MT  United States  59620-1001

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590

  Research and Innovative Technology Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Berry, Michael
  • Stephens, Jerry
  • Bermel, Bethany
  • Hagel, Adam
  • Schroeder, David
• Publication Date: 2013-11

Language

• English

Media Info

• Media Type: Digital/other
• Edition: Final Report
• Features: Appendices; Figures; Photos; References; Tables;
• Pagination: 191p

Subject/Index Terms

• TRT Terms: Aggregates by gradation; Concrete pavements; Durability tests; Feasibility analysis; Mechanical tests; Mix design; Pavement performance; Portland cement concrete; Reclaimed asphalt pavements
• Geographic Terms: Montana
• Subject Areas: Highways; Materials; Pavements; I22: Design of Pavements, Railways and Guideways; I30: Materials;

Filing Info

• Accession Number: 01499711
• Record Type: Publication
• Report/Paper Numbers: FHWA/MT-13-009/8207
• Contract Numbers: MSU G&C #4W2781; MDT Project #8207
• Files: UTC, TRIS, RITA, ATRI, USDOT, STATEDOT
• Created Date: Nov 21 2013 9:22AM